The move also helps the Department of Interior (DOI) meet recent DOI Inspector General Evaluation Report (#2003-I-0051) recommendations to simplify their web presence, increase security, and control content, while still maintaining a recognizable connection to the Historic Bottle Website. What technology, techniques, or processes were used to manufacture the bottle? Where did the bottle come from, i.e., where was it made and/or used? Where can I go for more information on historic bottles? The opinions expressed on this website are those of the author/content manager of this website and not necessarily those of the Bureau of Land Management or Department of Interior.
Fundamental to stratigraphy are a set of simple principles, based on elementary geometry, empirical observation of the way these rocks are deposited today, and gravity.
Most of these principles were formally proposed by Nicolaus Steno (Niels Steensen, Danish), in 1669, although some have an even older heritage that extends as far back as the authors of the Bible.
They are the "initial working hypotheses" to be tested further by data.
In this situation, the cave contents are younger than both the bedrock below the cave and the suspended roof above.